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This is the maximum distance at which the light can be seen and is depending upon the intensity of the light and the atmospheric visibility prevailing. It takes no account of the height of the light nor that of the observer’s eye. The more intense the light the further it will be seen, whatever the [...]
Posts Tagged ‘atmosphere’
SATELLITE NAVIGATION SYSTEM VARIOUS ERROR SOURCES
Posted by author on August 11th, 2008
Ionospheric and atmospheric error can cause when the signal path from the satellite to the receiver passes through the ionosphere and the troposphere. The ionosphere is the part of atmosphere characterized by high ion density, it starts at 70-80 km above the earths surface. The troposphere is the lower part of the atmosphere stretching [...]
Posted in Navigation 
Tags: absolute accuracy, atmosphere, density, dynamic conditions, earths surface, equator, gps receiver, humidity, interaction, ionosphere, mathematical model, pressure temperature, range error, relative speed, satellite, signal path, signals, troposphere, water vapour, weather systems 
No Comments »Loss of Tank Environmental Control
Posted by author on June 12th, 2008
Many noxious liquid substances carried as cargo by sea are required to have the atmosphere above the liquid controlled in order to ensure safety. Loss of this control can result in a hazardous situation that may lead to marine pollution. If loss of control occurs in tanks containing such cargoes, the following measures can avoid [...]
Posted in Ships Safety Procedure Tags: accordance with chapter, atmosphere, compatibility, corrective action, dangerous situation, environment control, hazardous situation, hull stress, information sheet, liquid levels, liquid substance, marine pollution, safety measures, spill, tank coating, tank type, tanks, temperatures, type material No Comments »Hazardous Vapour Release
Posted by author on June 12th, 2008
For oil tankers and cargo vessels at sea, it is unlikely that a significant marine pollution hazard will be created solely by vapour release. In port the main problem with such an event is the safety of the crew and nearby shore personnel in a flammable or toxic atmosphere.
Steps to be taken immediately:
Stop any cargo, [...]
Rescue from Enclosed Spaces
Posted by author on June 7th, 2008
When an accident involving injury to personnel occurs in an enclosed space, the first action should be to raise the alarm. Although speed is often vital in the interest of saving life, rescue operations should not be attempted until the necessary assistance and equipment have been obtained. There are many examples of lives being lost [...]
